I know I'm doing something wrong

I know I'm doing something wrong I want to validate the upload on the extension so I've selected file extension in the bindings but the validation always returns wrong.

TIA,

The File Extension validation type expects to passed in the full file name, not just the extension.


Instead of the Selecting the file Field File Extension binding for the server variable, select the file Field File Name binding.

I've rebuilded the page again. In the server behaviour I select Simple File Name to validate the extension still it keeps blocking the right files with the allowed extensions?

TIA

the simple file name binding passes only the file name, not the extension.


in your screen shot, the first binding is named "file" without a lightning bolt next to it, that is the binding to choose.